Display screen or portion thereof with an animated graphical user interface



FIG. 1 is a front view of a first image of a display screen or portionthereof with an animated graphical user interface; and,

FIG. 2 is a front view of a second image thereof.

The appearance of the animated graphical user interface transitionssequentially between the images shown in FIGS. 1 and 2. The outermostbroken lines illustrate a display screen or portion thereof and form nopart of the claimed design. The remaining broken lines, illustratingportions of the animated graphical user interface, form no part of theclaimed design. The process or period in which one image transitions toanother forms no part of the claimed design.

CLAIM The ornamental design for a display screen or portion thereof withan animated graphical user interface, as shown and described.